﻿<template>
  <div class="add-goods">
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 提示消息 -->
      <el-alert
        title="添加商品信息"
        type="info"
        center
        :closable="false"
        close-text
        show-icon>
      </el-alert>
      <!-- 步骤区域 -->
      <!-- 此activeIndex接受数值类型，数字类型 - 0 = 数值 -->
      <el-steps
      :active="activeIndex- 0"
      align-center
      finish-status="success">
        <el-step title="基础信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- 标签页区域 -->
      <el-form :model="addForm"
      :rules="addFormRules"
      label-position="top"
      label-width="100px"
      ref="addFormRef">
        <el-tabs tab-position="left"
        :before-leave="beforeTabLeave"
        @tab-click="tabClicked"
        v-model="activeIndex">
          <el-tab-pane label="基础信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input type="number" v-model="addForm.goods_price"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input type="number" v-model="addForm.goods_weight"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input type="number" v-model="addForm.goods_number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                v-model="addForm.goods_cat"
                :options="catelist"
                export-trigger="hover"
                :props="cateProps"
                @change="handleChange">
              </el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!-- 渲染表单的item项 -->
            <el-form-item :label="item.attr_name"
            v-for="item in manyTableData"
            :key="item.attr_id">
            <el-checkbox-group v-model="item.attr_vals">
              <el-checkbox
              v-for="(cb, i) in item.attr_vals"
              :key="i"
              :label="cb"
              border
              ></el-checkbox>
            </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item
            :label="item.attr_name"
            v-for="item in onlyTableData"
            :key="item.attr_id"
            >
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- action表示图片要上传的后台api接口地址 -->
          <el-upload
            class="upload-demo"
            :action="uploadURL"
            :on-preview="handlePreview"
            :on-remove="handleRemove"
            :on-success="handleSuccess"
            :headers="headerObj"
            list-type="picture">
            <el-button size="small" type="primary">点击上传</el-button>
            <!-- <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div> -->
          </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <quill-editor
              v-model="addForm.goods_introduce"/>
            <!-- 添加商品按钮 -->
            <el-button type="primary"
            class="btnAdd"
            @click="add"
            >添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 图片预览效果 -->
    <el-dialog
      title="图片预览"
      :visible.sync="previewVisible"
      @close="previewClosed"
      width="50%">
      <el-image :src="previewPath"
      class="previewImg"
      fit="fill"
      alt="上传图片"></el-image>
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
  data () {
    return {
      // 步骤条index状态和标签页index为同一项
      activeIndex: '0',
      // 添加商品的表单
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_number: 0,
        goods_weight: 0,
        // 商品分类所属数组
        goods_cat: [],
        // 图片数组
        pics: [],
        // 富文本 商品详情描述
        goods_introduce: '',
        // 对动态参数列表数据和静态参数列表数据处理存放金attrs数组中
        attrs: []
      },
      // 表单校验规则
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请选择商品分类', trigger: 'blur' }
        ]
      },
      // 商品分类数据
      catelist: [],
      //
      cateProps: {
        label: 'cat_name',
        value: 'cat_id',
        chilren: 'chilren'
      },
      // 动态参数列表数据
      manyTableData: [],
      // 静态参数列表数据
      onlyTableData: [],
      // 图片上传地址
      uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
      // 由于upload 没有axios的token,所以图片上传组件的headers请求头对象
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      // 触发预览事件的时候触发
      previewPath: '',
      // 图片预览弹框显示与隐藏
      previewVisible: false
    }
  },
  created () {
    this.getCateList()
  },
  methods: {
    // 获取商品分类数据
    async getCateList () {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类信息失败!')
      }
      // console.log(res)
      this.catelist = res.data
      this.$message.success('获取商品分类信息成功!')
    },
    // 级联选择器选中项变化，会触发的函数
    handleChange () {
      // console.log(this.addForm.goods_cat)
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    // 不选择级联项不运行跳转到其他标签页
    beforeTabLeave (activeName, oldActiveName) {
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类！')
        return false
      }
    },
    async tabClicked () {
      // 访问的是动态参数面板
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
          params: { sel: 'many' }
        })
        if (res.meta.status !== 200) {
          return this.$message.error('获取动态参数列表失败!')
        }
        // console.log(res)
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(',')
        })
        this.manyTableData = res.data
        this.$message.success('获取动态参数列表成功!')
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
          params: { sel: 'only' }
        })
        if (res.meta.status !== 200) {
          return this.$message.error('获取静态参数列表失败!')
        }
        console.log(res)
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(',')
        })
        this.onlyTableData = res.data

        this.$message.success('获取静态参数列表成功!')
      }
    },
    // 处理图片预览效果事件
    handlePreview (file) {
      this.previewPath = file.response.data.url
      this.previewVisible = true
    },
    // 点击x删除图片
    async handleRemove (file) {
      // 1.获取将要删除的图片的临时路径
      const filePath = file.response.data.tmp_path
      // 2.从pics数组中，找到这个图片对应的索引值
      // x === 数组中的每一项
      const i = await this.addForm.pics.findIndex(item => item.pic === filePath)
      // 3.调用数组的splice方法，把图片信息对象，从pics数组中删除
      this.addForm.pics.splice(i, 1)
      console.log(this.addForm)
    },
    // 监听图片上传成功事件 response 为服务器返回对象
    async handleSuccess (response) {
      // console.log(response)
      // 1.拼接得到一个图片信息对象
      // 2.将图片信息对象，push到pics数组中
      const picInfo = {
        pic: response.data.tmp_path
      }
      this.addForm.pics.push(picInfo)
      // console.log(this.addForm)
    },
    // 关闭图片弹框
    previewClosed () {
      this.previewVisible = false
    },
    // 添加商品
    add () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return this.$message.error('请填写必要的表单项！')
        // 由于级联选择器要求它的项必须是数组，所以要给它一个深拷贝
        // lodash包 cloneDeep()
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        // 处理动态参数
        this.manyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            // 后台接收字符串
            attr_value: item.attr_vals.join(',')
          }
          this.addForm.attrs.push(newInfo)
        })
        // 处理静态参数
        this.onlyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            // 后台接收字符串
            attr_value: item.attr_vals
          }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        // console.log(form)
        // 发起请求，添加商品，商品名称必须唯一
        const { data: res } = await this.$http.post('goods', form)
        if (res.meta.status !== 201) {
          return this.$message.error('添加商品失败！')
        }
        this.$message.success('添加商品成功！')
        this.$router.push('/goods')
        })
    },
    beforeRemove () {},
    handleExceed () {}
  },
  computed: {
    cateId () {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>

<style lang="less" scoped>
.add-goods{
  .el-steps{
    margin:15px 0;
  }
  .el-step__title{
    font-size:13px;
  }
  .el-checkbox{
    margin: 0 5px 0 0 !important;
  }
  .previewImg{
    width:100%;
  }
  .btnAdd{
    margin:15px 0;
  }
}
</style>
